| 摘要 |
PURPOSE:To easily and reliably measure a fluctuation in a ground, by a method wherein a guide pipe, temporarily holding a ground fluctuation following means, is inserted into an excavated hole, the ground fluctuation following means is secured, and a position is detected by the use of a probe. CONSTITUTION:A boring hole 2 is excavated in a ground 1, ground is poured, and a guide pipe, temporarily holding a ground fluctuation following means in a position, is inserted. The ground fluctuation following means 4 is secured to a given stratum, and is slid along the peripheral wall of the guide pipe 3 in a manner to follow along with the fluctuation of the stratum. A probe 14 is hung down at the interior of the guide pipe 3 by means of a cable 15, and by means of a signal and from an unwinding amount of the cable 15, the position of the means 4 is detected. This enables the means to be easily installed within a ground, and to be reduced in size through simple constitution. |
